JP2011034881A - Connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To raise reliability for an electrical contact of mutual terminals of a connector. <P>SOLUTION: The connector has a connector housing 40; a plurality of terminal metal fitting 31 having holding sections 34 with fastening pieces 35 which are fitted to three or more of pins 28 prepared to a mating connector 20, and wire barrels 32 for connecting electric wires W so as to extend in a direction crossed with the pin 28; an opening 77 formed at a position corresponding to the fastening piece 35 of the terminal metal fitting 31 in the connector housing, a lid member 85 mounted so as to close the opening 77 with a bolt 110, and a plurality of fastening members 100 acting on the holding section 34 via the fastening piece 35 in a direction wherein fastening force to the pin 28 is increased by being accompanied with mounting the lid member 85 on the opening 77. An action point of force of the bolt 110 in the mounting direction of the lid member 85 is arranged inside an imaginary polygon formed by respective fastening members 100. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a wire-side connector that is fitted and connected to a device-side connector.

  As an example of a conventional shield connector, one described in Patent Document 1 is known. This device is equipped with a device-side connector fitted with a terminal fitting and a wire-side connector fitted with a terminal fitting connected to an electric wire, and the device-side connector has a male terminal with a tab and an elastic contact piece. One of the female terminals has a structure in which either the male terminal or the female terminal is applied to the wire side connector, and the tab is elastic when the wire side connector is fitted to the device side connector. The corresponding male terminal and female terminal are fitted and connected to each other while being in sliding contact with the contact piece.

JP 2005-276570 A

In the above conventional structure, the terminal fitting attached to the wire side connector is locked by the lance to prevent it from coming off, but if the wire is pulled or shaken greatly, the terminal connected to the wire Since the metal fittings move back and forth, and the contact portions of the male and female terminal fittings slide with it, it is not always preferable in view of the reliability of electrical contact, and further improvement has been desired.
The present invention has been completed based on the above circumstances, and an object thereof is to improve the reliability of electrical contact between terminals.

  The connector according to the present invention includes a connector housing, a fitting portion that is attached to the connector housing and is fitted to each of three or more pins provided in the mating connector, and an electric wire extending in a direction crossing the pins. A plurality of terminal fittings having an electric wire connecting portion for connecting, an opening formed at a position corresponding to the fitting portion of the terminal fitting in the connector housing, and the opening being closed by a booster mechanism And a plurality of tightening portions that act on each fitting portion in a direction to increase the tightening force with respect to the pin as the cover member is mounted on the opening. It is characterized in that the point of action of the force in the mounting direction of the lid member by the booster mechanism is arranged inside a virtual polygon formed by the fastening portions.

  When a connector housing fitted with a plurality of terminal fittings connected to an electric wire is fitted to the mating connector, the fitting portion of each terminal fitting is fitted to the corresponding mating pin, and the opening of the connector housing is a lid member When it is closed and attached by a booster mechanism, the tightening portion increases the tightening force of each fitting portion with respect to the pin, and electrical contact between the pin and the terminal fitting is taken. The fitting part of the terminal fitting connected to the electric wire has a structure in which a pin facing the direction intersecting the axial direction of the electric wire is tightened, so the terminal can be used even when an external force such as pulling or vibration acts on the electric wire. The movement of the metal fitting is restricted, so that the terminal metal fitting and the pin are held in a strong contact state.

  In addition, when the lid member is attached to the opening, and the fastening part functions to engage with the corresponding fitting part of the terminal fitting and increase its fastening force, a corresponding attachment resistance is obtained. However, since the booster mechanism is used, the operation force required to mount the lid member is reduced. In addition, since the point of action of the force by the booster mechanism is arranged inside the virtual polygon formed by each tightening part, resistance is applied at a location that is balanced with respect to the point of action. As a result, the lid member is straightly and smoothly mounted without tilting. That is, the operation force for mounting the lid member can be kept small, and the work can be performed efficiently and accurately.

The following configuration may also be used.
(1) The fitting portion of the terminal metal fitting is formed in a pair formed on the tip side of each holding portion, with a holding portion that wraps around the both sides of the pin in an arc shape and sandwiches the pin The opening is formed at least in a region corresponding to each fastening piece, and the fastening portion is provided on the lid member in a direction in which the pair of fastening pieces are brought close to each other. It is a fastening member which is displaced and fastens the pin by the holding portion.
When the connector housing with the terminal fittings is fitted to the mating connector, the holding parts of the terminal fittings are simultaneously fitted to the mating pins, and when the opening of the connector housing is closed by the lid member, the lid member The fastening member provided on the terminal displaces the pair of fastening pieces of each terminal fitting in a direction approaching each other, so that the holding portion pinches the pin, thereby making electrical contact between the pin and the terminal fitting. It is done.

(2) The booster mechanism includes a bolt that is inserted through the lid member and a bolt hole that is provided in the connector housing to be screwed into the bolt.
(3) The booster mechanism includes a bolt that penetrates through the lid member, and a bolt hole that is provided in the connector housing to be screwed into the bolt, and the bolt is the lid member. When the bolt is engaged with the bolt hole during initial mounting of the lid member, the fastening member is engaged with the corresponding pair of fastening pieces. is there.
When the lid member is initially attached to the opening, the fastening member engages with the corresponding pair of fastening pieces at the same timing as the tip of the bolt temporarily assembled to the lid member engages with the bolt hole. From the beginning of receiving resistance by engagement with the tightening piece, a boosting function by bolting can be exhibited. In other words, the boosting function by the bolt can be used efficiently.

(4) Seal members are respectively attached to the lead-out portion of the electric wire in the connector housing and the fitting portion between the opening and the lid member of the connector housing. The connection portion between the terminal fitting housed in the connector housing and the pin of the mating connector is waterproofed to the outside.
(5) The connector housing has a structure in which a synthetic resin inner housing fitted with terminal fittings is accommodated in a shield shell, and the shield shell is attached to a metal body such as a case of a device. A shield structure can be realized.

  According to the present invention, the reliability of electrical contact between terminals can be increased, and the operation of mounting the lid member can be easily and accurately performed to obtain the same effect.

The perspective view of the electric wire side connector concerning one embodiment of the present invention. Plan view The perspective view which shows the state before the fitting of the electric wire side connector and the equipment side connector Exploded perspective view of the inner housing side of the wire side connector An exploded perspective view of the shield shell side Plan view of the wire side connector before mounting the cover member 2 is a cross-sectional view taken along line AA in FIG. 2 before the cover member is attached. Sectional view taken along line BB in FIG. 2 is a cross-sectional view taken along the line AA in FIG. The CC sectional view taken on the line in FIG. Sectional view taken along line BB in FIG.

<Embodiment>
An embodiment of the present invention will be described with reference to FIGS. In this embodiment, a wire-side connector 30 (corresponding to the connector of the present invention) provided at the end of the wire W and a device-side connector 20 (corresponding connector of the present invention) provided in a device such as a motor or an inverter of an electric vehicle ) Is a collective fastening type shield connector. The device 10 has a structure in which a device body (not shown) is accommodated in a metal case 11 (see FIG. 7).

As shown in FIG. 3, the device-side connector 20 includes a terminal block 21 having a planar rectangular block shape, and a narrow portion 24 is continuously provided on the upper surface of the terminal block 21 at the center of one side edge of the wide portion 23. A mounting groove 22 having a planar convex shape is formed. A protruding wall 25 is formed at the upper end of the wall surface corresponding to both ends of the wide portion 23 in the mounting groove 22.
A total of three mounting holes 26 (see FIG. 7) are formed at both ends of the narrow portion 24 and the wide portion 23 of the mounting groove 22 in an arrangement that virtually forms a right-angled isosceles triangle. In each mounting hole 26 of the terminal block 21, a terminal pin 28 made of a round pin connected to a conductive path on the device side is erected. The upper end portion of the terminal pin 28 is formed in a tapered shape that is slightly tapered (taper portion 28A).

On the other hand, the horizontal wall surface 12 in the device case 11 has a flat rectangular window hole for fitting the terminal block 21 substantially tightly, and the device-side connector 20 has the lower end of the terminal block 21 at the lower end. It is fitted in the window hole 13 and arranged in a form in which the upper side protrudes above the wall surface 12.
A packing mounting groove 14 is formed at the hole edge on the surface side of the window hole 13 of the wall surface 12 of the device case 11.

Next, the electric wire side connector 30 will be described. The electric wire side connector 30 has a structure in which terminal fittings 31 are respectively connected to the ends of the three electric wires W, and these terminal fittings 31 are mounted in the connector housing 40 in a predetermined arrangement.
The terminal fitting 31 is formed by pressing a metal plate having excellent conductivity, and includes two first terminal fittings 31A and one second terminal fitting 31B as shown in FIG.

As shown in FIG. 7, the first terminal fitting 31 </ b> A has a strip shape in front of a wire barrel 32 (corresponding to the electric wire connecting portion of the present invention) that is crimped to the end of the exposed core wire Wa in the electric wire W. A holding portion 33A is provided continuously, and a holding portion 34 that is fitted to the terminal pin 28 of the device-side connector 20 is formed on the lower surface of the holding portion 33A on the distal end side. A locking hole 36 is opened on the proximal end side of the holding portion 33A.
The holding portion 34 has a tapered cylindrical shape that is gradually reduced in diameter toward the upper end, following the tapered shape of the upper portion of the terminal pin 28, and the front peripheral surface of the cylindrical portion is laterally sandwiched by a vertical groove. The shape is divided, and the rear edge side of the upper edge of the cylinder is connected to the tip of the holding portion 33A. A pair of tightening pieces 35 are formed to extend in parallel with each other from both divided ends of the holding portion 34. The holding portion 34 including the pair of fastening pieces 35 corresponds to the fitting portion of the present invention.

In the natural state, the holding portion 34 described above can be fitted with a slight clearance with respect to the tapered portion 28A of the terminal pin 28, and when the fastening pieces 35 approach each other, the holding portion 34 is reduced in diameter. By deforming, the terminal pin 28 can be tightened.
The second terminal fitting 31B has a shorter overall length of the holding portion 33B than the first terminal fitting 31A, and is otherwise the same as the structure of the first terminal fitting 31A.

The connector housing 40 is roughly divided into an inner housing 41 for mounting the above-described three terminal fittings 31, a shield shell 70 for accommodating the inner housing 41 therein, and an opening 77 provided on the upper surface of the shield shell 70. And a lid member 85 that closes the door.
Inside the inner housing 41, the second terminal fitting 31 </ b> B is mounted in a form aligned in the lateral direction so that the first terminal fitting 31 </ b> A is located on both sides thereof. The inner housing 41 is made of a synthetic resin, and is provided with a front housing portion 42 and a rear housing portion 60 connected to the rear portion side. The front housing portion 42 is vertically moved to an upper housing portion 43U and a lower housing portion 43L. It is divided into a total of 3 pieces.

  The front housing part 42 configured by combining the upper and lower housing parts 43U and 43L is generally provided with a stepped flange 46 on the outer periphery of the front surface of the horizontally long oval part 45, and from the front surface. The sandwiching portion 47 and the insulating plate 48 are provided. In the upper and lower housing parts 43U and 43L, the insertion parts 49 provided at both ends of the divided flange 46 in the lower housing part 43L are provided to face both ends of the divided flange 46 in the upper housing part 43U. By being inserted into the insertion groove 50, they are integrally coupled.

In the oval part 45 of the front housing part 42, as shown in FIG. 7, the wire barrel 32 of the three terminal fittings 31 described above is accommodated, and the covering Wb on the electric wire W to which the terminal fitting 31 is connected. The storage chamber 52 into which the terminal is inserted is formed side by side in the horizontal direction of the three chambers.
Regarding the structure of the front side of the oval portion 45 in the front housing portion 42, in the lower housing portion 43 </ b> L, the central portion in the length direction of the holding portions 33 </ b> A and 33 </ b> B of the terminal fitting 31 is located in front of each divided storage chamber 52. The lower clamping plates 53A and 53B having a shallow dish shape for receiving the projection are formed to protrude. However, in correspondence with the lengths of the holding portions 33A and 33B of both terminal fittings 31A and 31B, the central lower clamping plate 53B is formed shorter than the lower clamping plates 53A at both ends.
In the upper housing portion 43U, upper clamping plates 54A and 54B are formed to protrude in front of the divided storage chambers 52 so as to overlap the upper surfaces of the lower clamping plates 53A and 53B. Similarly, the upper upper clamping plate 54B in the center is formed shorter than the upper clamping plates 54A at both ends.

  On the lower surface of the base end portion of each of the upper sandwiching plates 54A and 54B of the upper housing portion 43U described above, a locking projection 55 is fitted in the locking hole 36 at the base end of the holding portions 33A and 33B in the terminal fitting 31. Projected. On the other hand, two insulating plates 48 are formed to extend forward from the front surface of the lower housing portion 43L so as to partition the terminal fittings 31 from each other. The insulating plate 48 has a stepped shape in which the upper edge on the base end side is raised.

  The rear housing part 60 is formed in a block shape having an oval cross section as a whole, and a fitting recess 61 in which the oval part 45 of the front housing part 42 is closely fitted is formed on the front surface of the rear housing part 60. Has been. Three wire insertion holes 62 are formed in the inner wall of the fitting recess 61 so as to correspond to the storage chamber 52, and the diameter of the mounting holes is increased around the rear end side of each wire insertion hole 62. 63 is formed to be open on the rear surface. A rubber plug 65 and a rubber plug retainer 66 can be mounted in each mounting hole 63.

  Each terminal fitting 31 is attached to the inner housing 41 by the following procedure. The terminal fitting 31 crimped and crimped to one end of the electric wire W is arranged in such a manner that the second terminal fitting 31B comes to the center and the first terminal fitting 31A comes to both sides as described above, and the other end of each electric wire W is The rear housing part 60 is passed through the fitting recess 61 from each electric wire insertion hole 62 to the rear. Further, the rubber stopper 65 and the rubber stopper holder 66 are also passed through. From this state, each terminal fitting 31 is placed on the lower housing portion 43L. Specifically, the wire barrel 32 and the end of the covering Wb are fitted into the half-divided housing chamber 52, and the holding portions 33A and 33B are sandwiched below. It is placed on the plates 53A and 53B.

Subsequently, when the upper housing part 43U is put on and joined to the lower housing part 43L, the wire barrel 32 of each terminal fitting 31 and the terminal of the covering Wb are housed in the housing chamber 52 of the joined front housing part 42. At the same time, the holding portions 33A and 33B of the respective terminal fittings 31 are sandwiched between the upper and lower clamping plates 54A and 53A or 54B and 53B, and the locking projections 55 provided on the upper housing portion 43U together with the corresponding holding portions The portions 33A and 33B are fitted and locked in the locking holes 36 on the base end side.
The holding part 34 and the fastening piece 35 of each terminal fitting 31 are in a state of protruding forward of the holding part 47, and the protruding length of the holding part 34 in the central second terminal fitting 31B is short. The holding portion 34 is virtually arranged in a right-angled isosceles triangle corresponding to the terminal pin 28 erected on the terminal block 21 of the device-side connector 20. In addition, as shown in FIG. 6, the pair of tightening pieces 35 provided on the front side of each holding portion 34 are also arranged so as to virtually form a right-angled isosceles triangle T. Further, the holding portions 34 of the respective terminal fittings 31 are partitioned and insulated by an insulating plate 48.

From this state, the rear housing part 60 moves forward along the electric wire W, and the oval part 45 of the front housing part 42 is tightly fitted into the fitting recess 61 on the front surface. Thereby, each terminal metal fitting 31 is assembled | attached with respect to the inner housing 41 in the form which protruded each holding part 34 ahead in the predetermined arrangement | sequence. At the same time, a rubber plug 65 inserted through the electric wire W is fitted into each mounting hole 63 on the rear surface of the inner housing 41, and a rubber plug presser 66 is further pushed in from the rear to provide elasticity provided vertically. The locking pieces 67 are fitted and locked in locking holes 68 opened on both upper and lower surfaces of the mounting hole 63.
A seal ring 69 </ b> A is fitted between the flange 46 of the front housing portion 42 and the stepped flange 69 of the rear housing portion 60.

The shield shell 70 is made of aluminum die-cast, and as shown in FIG. An insertion hole 71 having an oval cross section through which the inner housing 41 can be inserted is opened on the rear wall of the shield shell 70, and a thick wall is formed on the outer peripheral surface of the outer end of the insertion hole 71. A connecting portion 72 having a flange shape is formed. At the left and right end portions of the connecting portion 72, mounting portions 73 are formed so as to protrude and screw holes 74 are cut.
The stepped surface of the stepped flange 69 on the outer peripheral surface of the inner housing 41 is tightly fitted to the rear end portion of the insertion hole 71, and the outer peripheral portion of the flange 69 is the edge of the insertion hole 71, that is, the connecting portion 72. It comes to contact with.

  Similarly, an aluminum die-cast bracket 80 is connected to the rear surface side of the insertion hole 71 of the shield shell 70. The bracket 80 has a cylindrical shape with an oval cross section, and the rear side is inserted through a stepped flange 69 in the inner housing 41. On the front side, the connecting portion 72 of the shield shell 70 is connected to the bracket 80. A flange-like connecting portion 82 having a corresponding front shape and a bowl-shaped cross section is formed. A screw insertion hole 84 is formed in the attachment portion 83 protruding from the left and right ends of the connection portion 82 in correspondence with the screw hole 74 of the connection portion 72 on the shield shell 70 side.

  At a position near the rear end of the outer bottom surface of the shield shell 70, a rectangular fitting cylinder portion 75 that closely fits into the window hole 13 of the wall surface 12 of the device case 11 projects in a form communicating with the inside. Is formed. As will be described later, when the inner housing 41 fitted with the terminal fitting 31 is properly accommodated in the shield shell 70, the holding portion 34 of each terminal fitting 31 faces downward through the fitting cylinder portion 75. It becomes. A mounting plate 76 having a screw insertion hole 76 </ b> A is formed on the base end side of both the left and right sides of the fitting cylinder 75.

  On the other hand, a rectangular opening 77 is formed in the upper surface wall of the shield shell 70 at the front end side of the shield shell 70. The opening 77 is surrounded by a peripheral wall. Similarly to the above, when the inner housing 41 fitted with the terminal fitting 31 is properly accommodated in the shield shell 70, the fastening pieces 35 at the ends of the holding portions 34 in the respective terminal fittings 31 are aligned and opened. 77, the state facing upward.

A lid member 85 is attached to the opening 77. The lid member 85 has a structure in which a push body 90 made of synthetic resin is attached to the lower surface of a lid plate 86 made of aluminum die cast.
As shown in FIG. 7, the cover plate 86 is shaped like a flat plate having a flat surface, and a flange 87 is formed at a position slightly above the center height of the outer peripheral surface. A fitting groove 89 of the packing 88 is formed in a portion below the flange 87 in the inner shell, and the fitting portion of the packing 88 can be fitted into the peripheral wall of the opening 77 of the shield shell 70.

The pushing body 90 includes a substrate 91 stretched on the back surface side of the cover plate 86, and leg bodies 92 each having a prism shape are suspended from both ends of the front edge and the center portion of the rear edge on the back surface of the substrate 91. It is installed.
The attachment structure of the cover plate 86 and the pusher 90 corresponds to the positions corresponding to the two ends of the front edge and the center of the rear edge on the rear surface of the cover plate 86, that is, the three places where the legs 92 of the pusher 90 are suspended. The mounting pin 93 is integrally formed downward. On the other hand, insertion holes 94 through which the mounting pins 93 are inserted are formed at three positions corresponding to the hanging positions of the legs 92 on the substrate 91 of the pusher 90, and at the upper ends of the legs 92, respectively. The mounting hole 95 communicating with the above-described insertion hole 94 is formed so as to open on both the front and rear surfaces.

  In assembly, the mounting pin 93 is inserted into the corresponding insertion hole 94, the substrate 91 of the pusher 90 is applied to the back surface of the cover plate 86, and the mounting hole 95 from the upper surface of the mounting hole 95 in each mounting pin 93. By fitting and locking the E-ring 97 through the washer 96 to the portion protruding inward, the pusher 90 is integrally assembled with the lower surface of the lid plate 86.

A pair of fastening pieces 35 provided at the front end of the holding portion 34 of the terminal fitting 31 are elastically held at the lower ends of the three legs 92 provided on the lid member 85. A fastening member 100 (corresponding to a fastening portion of the present invention) is provided.
The fastening member 100 is formed by pressing a metal plate such as a spring steel plate, and has a front gate shape in which a pair of sandwiching pieces 102 are vertically suspended from the left and right side edges of the upper surface plate 101. At both front and rear edges of the face plate 101, mounting pieces 103 projecting to the left and right are formed. Projecting portions 102 </ b> A are formed on the opposing surfaces of the pair of sandwiching pieces 102.

On the other hand, a mounting groove 105 having a lower surface opening is formed in the lower end portion of each leg 92 so as to open to the rear surface. The mounting groove 105 has a width that allows the pair of clamping pieces 102 in the fastening member 100 described above to be inserted with a slight clearance, and attachment pieces 103 are provided on the left and right side edges of the ceiling surface of the mounting groove 105. A press-fitting groove 106 to be press-fitted is formed in a protruding manner.
Therefore, the fastening member 100 is accommodated from the rear in the mounting groove 105 while the mounting piece 103 is press-fitted into the press-fitting groove 106. At this time, the pair of sandwiching pieces 102 have a slight clearance in the width direction in the mounting groove 105. And is accommodated over almost the entire height.

  As a mounting structure of the lid member 85, a mounting base 78 is erected at the center in the width direction of the bottom wall where the shield shell 70 is left, and a bolt hole 79 is formed on the top surface of the mounting base 78. ing. As shown in FIG. 6, when the three terminal fittings 31 together with the inner housing 41 are properly mounted in the shield shell 70, the bolt holes 79 are located at the tip of the holding portion 34 in both the first terminal fittings 31A. It is formed at an intermediate position of the fastening piece 35, in other words, a position corresponding to the center of the bottom side of the right-angled isosceles triangle T that is an arrangement structure of the three sets of fastening pieces 35.

  A bolt 110 that is screwed into the bolt hole 79 is mounted in advance on the lid member 85 side. Therefore, the center part of the front edge side of the base plate 91 of the cover plate 86 and the pushing body 90, that is, the position corresponding to the position directly above the bolt hole 79 when the cover member 85 is properly attached to the opening 77 is shown in FIG. Thus, the insertion holes 111A and 111B of the bolt 110 are opened. The bolt 110 is inserted through both the insertion holes 111 </ b> A and 111 </ b> B through a washer 112 with a rubber bush, and the E-ring 114 is fitted into the portion of the bolt 110 protruding from the lower surface of the substrate 91 through the washer 113. Thus, the bolt 110 is temporarily assembled in a state where the bolt 110 is prevented from coming off.

When the cover member 85 is modified, three fastening members 100 are provided in an arrangement forming a right isosceles triangle corresponding to the arrangement of the three sets of fastening pieces 35, and the arrangement structure of the three fastening members 100 is the same. The bolt 110 is temporarily assembled at a position corresponding to the center of the base of the right-angled isosceles triangle. The bolt hole 79 and the bolt hole 79 into which the bolt 110 is screwed correspond to the booster mechanism of the present invention.
When the lid member 85 is inserted into the opening 77 on the upper surface of the shield shell 70 in a normal posture, the lower end of the bolt 110 is engaged with the upper end of the bolt hole 79 of the mounting base 78 in the shield shell 70 at the same time. The fastening member 100 attached to the lower end of the leg 92 is set to face the upper end of the pair of fastening pieces 35 of the corresponding terminal fitting 31.

Then, the effect | action of this embodiment is demonstrated.
First, the electric wire side connector 30 is assembled. As described above, the terminal fittings 31 fixed to the ends of the three electric wires W are attached to the inner housing 41 in such an arrangement that the first terminal fittings 31A come on both sides of the second terminal fitting 31B. In each terminal fitting 31, the wire barrel 32 is housed in the housing chamber 52, and the upper holding portions 33A and 33B are sandwiched by the sandwiching portions 47, while the upper housings are held in the locking holes 36 at the proximal end of the retaining portion 33A. It is mounted in a state where the locking projection 55 of the portion 43U is fitted and prevented from coming off. At this time, the holding portion 34 and the fastening piece 35 of each terminal fitting 31 protrude forward of the holding portion 47, and the holding portion 34 and the fastening piece 35 of each terminal fitting 31 are arranged in a right isosceles triangle. .
The electric wires W are drawn rearward from the mounting holes 63 on the rear surface of the inner housing 41, and rubber plugs 65 are fitted to the inner ends of the mounting holes 63 and are prevented from being removed by the rubber plug pressers 66. A seal ring 69 </ b> A is attached to the outer periphery of the inner housing 41.

Thus, the inner housing 41 provided at the end of the electric wire W is inserted into the shield shell 70 through the rear insertion hole 71, and the stepped surface of the stepped flange 69 provided on the outer peripheral surface of the inner housing 41 is formed. The push-in is stopped when the rear end portion of the insertion hole 71 is tightly fitted and the outer peripheral portion of the flange 69 hits the edge portion (connecting portion 72) of the insertion hole 71. At this time, the seal ring 69 </ b> A fitted to the outer periphery of the inner housing 41 is in close contact with the inner periphery of the insertion hole 71.
Next, the bracket 80 passed through the electric wire W is fitted to the rear end side of the inner housing 41, and the flange 69 of the inner housing 41 is connected between the connecting portion 82 on the front surface and the connecting portion 72 of the shield shell 70. The inner housing 41 and the terminal fitting 31 are accommodated at predetermined positions in the shield shell 70 by sandwiching the outer peripheral portion and fastening the connecting portions 72 and 82 together with bolts. At the same time, the outer periphery of the electric wire W is covered with a collective shield member made of a braided wire, and the open end thereof is fastened together with the connecting portion 82 of the bracket 80 and fixed.
As described above, when the inner housing 41 fitted with the terminal fitting 31 is properly accommodated in the shield shell 70, as shown in FIG. On the other hand, the fastening pieces 35 at the end of the holding portion 34 in each terminal fitting 31 are aligned and face upward through the opening 77.

Thus, the shield shell 70 that houses the inner housing 41 is fitted into the window hole 13 in the wall surface 12 of the device case 11 after the seal packing 75A is fitted into the fitting cylinder portion 75 on the lower surface. Accordingly, the holding portion 34 of each terminal fitting 31 facing the fitting cylinder portion 75 is fitted to the tapered portion 28 </ b> A of the corresponding terminal pin 28 of the device-side connector 20 facing the window hole 13. At this time, since a clearance is provided between the holding portion 34 and the tapered portion 28A of the terminal pin 28, no fitting resistance is generated.
When the mounting plate 76 of the fitting cylinder portion 75 hits the lip of the window hole 13, the pushing is stopped, and then the mounting plate 76 is bolted to be fixed to the wall surface of the device case 11. Accordingly, the shield shell 70 is grounded to the device case 11.

When the shield shell 70 is fixed, the lid member 85 is attached to the opening 77 on the upper surface thereof. A fastening member 100 is attached to each leg 92 of the lid member 85, and a bolt 110 is temporarily assembled. A packing 88 is also attached.
When the lid member 85 is inserted into the opening 77 on the upper surface of the shield shell 70, the lower end of the bolt 110 faces the upper end of the bolt hole 79 of the mounting base 78 in the shield shell 70 and is attached to the lower end of the leg 92 together with it. The tightened member 100 thus faced faces the upper ends of the pair of tightening pieces 35 of the corresponding terminal fitting 31.

  When the bolt 110 is tightened from such a state, the lid member 85 is drawn toward the shield shell 70, and accordingly, the clamping member 100 provided on the leg 92 of the lid member 85 is lowered, and both the sandwiching pieces 102 are paired with each other. The clamping pieces 35 are elastically sandwiched so as to be close to each other, and the holding portion 34 is reduced in diameter, so that it closely adheres to the outer periphery of the tapered portion 28A of the terminal pin 28 inserted therein, and is electrically connected. Is taken.

Here, when the fastening member 100 of each leg 92 is pushed in while sandwiching the corresponding pair of fastening pieces 35, a corresponding resistance is applied, but a pushing force is applied to the fastening position of the bolt 110, that is, the lid member 85. Since the action point to be set is set at a position that is substantially equidistant with good balance from the three places where the fastening member 100 is pushed into the fastening piece 35, the lid member 85 is tilted by receiving unbalanced resistance. Therefore, the lid member 85 can be pushed straight and smoothly.
When the flange 87 of the lid member 85 hits the edge of the opening 77, the pushing operation is stopped, and the operation of attaching the lid member 85 is completed. When the packing 88 fitted below the flange 87 is brought into close contact with the peripheral wall of the opening 77, the opening 77 is sealed.

As described above, according to the present embodiment, the holding portion 34 of the terminal fitting 31 connected to the electric wire W has a structure in which the mating terminal pin 28 facing the direction intersecting the axial direction of the electric wire W is sandwiched. Therefore, even when an external force such as pulling or vibration is applied to the electric wire W, the movement of the terminal fitting 31 is restricted, and the holding portions 33A and 33B of the terminal fitting 31 connect the holding portion 47 of the inner housing 41 with each other. By coming into contact with the upper sandwiching plates 54A and 54B that constitute, the terminal pin 28 is prevented from coming out, and the terminal fitting 31 and the mating terminal pin 28 are kept in a strong contact state.
Further, since the holding portion 34 of the terminal fitting 31 is fitted to the terminal pin 28 with a clearance and the holding portion 34 is tightened later, the fitting force between the connectors 20 and 40 can be kept small. The peeling of the plating applied to the terminal fitting 31 and the terminal pin 28 can be prevented.

Further, as the lid member 85 is attached to the opening 77, the fastening member 100 sandwiches the corresponding pair of corresponding fastening pieces 35 of each terminal fitting 31 to increase the fastening force of the holding portion 34. In this case, there is a corresponding resistance and a frictional resistance of the packing 88, but the operating force required to mount the lid member 85 by using the bolt 110 which is a booster mechanism is obtained. Can be reduced.
In addition, the fastening position of the bolt 110, that is, the point of action for applying the pushing force to the lid member 85, is set to a position that is substantially equidistant with good balance from the three places where the fastening member 100 is pushed into the fastening piece 35. In other words, since resistance is received at a well-balanced distance around the point of action, the lid member 85 is mounted straight and smoothly without tilting. In other words, the operation force for mounting the lid member 85 can be kept small, and the work can be performed efficiently and accurately.

Further, since the bolt 110 is temporarily assembled and assembled to the lid member 85, handling and component management are facilitated.
In addition, when the lid member 85 is initially attached to the opening 77, a pair of tightening members corresponding to the tightening member 100 at the same timing that the tip of the bolt 110 temporarily assembled to the lid member 85 faces the bolt hole 79. Since it is set to face the piece 35, the boosting function by tightening the bolt 110 can be exhibited from the beginning of receiving resistance by engaging with the fastening piece 35. In other words, the boosting function by the bolt 110 can be exhibited. It can be used efficiently.

  Since the clamping member 100 is formed by a spring member provided with a pair of clamping pieces 102 so as to be elastically openable and closable, the clamping part 34 is connected to the terminal by elastically clamping the clamping pieces 35 of the terminal fitting 31. It functions to tighten the pin 28. While the resistance when the fastening member 100 is inserted into the both fastening pieces 35 is kept relatively small, the fastening force can be secured by the restoring elasticity.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) As a fitting part of a terminal metal fitting, it is assumed that the fitting part is first fitted to the upper end side of the terminal pin, and a lid member is attached, as a tapered cylindrical shape fitting to the other terminal pin. Accordingly, the fitting portion may be pushed in to increase the tightening force on the terminal pin.
(2) As a booster mechanism applied when attaching the lid member, a lever mechanism may be applied in addition to the bolt-bolt hole exemplified in the above embodiment.

(3) The number of terminal fittings attached to the connector housing is arbitrary three or more. In that case, each fitting part of each terminal fitting is arranged in a polygonal shape, and the point of action of the force in the mounting direction of the lid member by a booster mechanism such as a bolt increases the fastening force of each fitting part. It needs to be arranged inside the same polygon formed by the fastening part that functions in particular.
As a result, regardless of the number of terminal fittings, it is possible to set the point of action for applying the pushing force to the lid member at a position as far as possible from a plurality of locations where the fastening portion engages with the fitting portion. For this reason, resistance can be received at a distance balanced around the operating point, and the cover member can be mounted straight and smoothly without tilting.

(4) The present invention can also be applied to a connector having no shield function.
(5) Furthermore, it can be applied to a non-waterproof connector.

10 ... Device 11 ... Device case 20 ... Device side connector (mating connector)
28 ... Terminal pin (pin)
31, 31A, 31B ... terminal fitting 32 ... wire barrel (wire connection part)
34 ... Holding part (fitting part)
35 ... Fastening piece (fitting part)
40 ... Connector housing 41 ... Inner housing 63 ... Mounting hole 65 ... Rubber stopper (seal member)
70 ... Shield shell 77 ... Opening 79 ... Bolt hole (boost mechanism)
85 ... Lid member 88 ... Packing (seal member)
100: Tightening member (tightening part)
110 ... Bolt (boost mechanism)
T ... Isosceles triangle (virtual polygon)

Claims (6)

A connector housing;
A plurality of fitting portions that are attached to the connector housing and are respectively fitted to three or more pins provided in the mating connector, and a wire connection portion that connects the wires so as to extend in a direction crossing the pins. Terminal fittings,
Of the connector housing, an opening formed at a position corresponding to the fitting portion of the terminal fitting,
A lid member mounted so as to close the opening by a booster mechanism;
A plurality of tightening portions that act on the fitting portions in a direction to increase the tightening force with respect to the pins in accordance with the mounting of the lid member to the opening portion are provided,
A connector characterized in that action points of force in the mounting direction of the lid member by the booster mechanism are arranged inside virtual polygons formed by the tightening portions. The fitting portion of the terminal fitting includes a holding portion that wraps in an arc shape on both sides of the pin and sandwiches the pin, and a pair of fastening pieces formed on the front end side of each holding portion. Formed, and the opening is formed at least in a region corresponding to each fastening piece,
2. The connector according to claim 1, wherein the tightening portion is a tightening member that is provided on the lid member and displaces the pair of tightening pieces in a direction approaching each other and tightens the pin by the holding portion. . The said booster mechanism is comprised from the volt | bolt with which the said cover member is penetrated, and the volt | bolt hole provided in the said connector housing so that it may be screwed together in this volt | bolt, or The connector according to claim 2. The booster mechanism includes a bolt that is inserted through the lid member, and a bolt hole that is provided in the connector housing to be screwed to the bolt, and the bolt is connected to the lid member. In addition to being temporarily assembled in a neck hanging state, when the bolt is engaged with the bolt hole when the lid member is initially mounted, the fastening member is set to engage with the corresponding pair of fastening pieces. The connector according to claim 2, characterized in that: 5. A seal member is attached to each of a lead-out portion of the electric wire in the connector housing and a fitting portion between the opening and the lid member of the connector housing. The connector as described in any one. The connector housing has a structure in which a synthetic resin inner housing with terminal fittings is accommodated in a shield shell, and the shield shell is attached to a metal body such as a case of an apparatus. The connector according to any one of claims 1 to 5.

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